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Re: [PATCH v3 for-4.22] EFI: Fix boot from a device without a file system
- To: Szymon Acedański <accek@xxxxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- Date: Tue, 2 Jun 2026 17:13:28 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Tue, 02 Jun 2026 15:13:33 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 5/25/26 7:37 PM, Szymon Acedański wrote:
When netbooting a unified Xen kernel image (via GRUB chainloader),
the resulting loaded_image->DeviceHandle does not support
SIMPLE_FILE_SYSTEM_PROTOCOL.
Instead of crashing via noreturn PrintErrMesg() in get_parent_handle(),
we defer calling this function until filesystem access is needed.
This way when booting UKI, get_parent_handle() is not called at all.
Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Suggested-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Szymon Acedański <accek@xxxxxxxxxxxxxxxxxxxxxx>
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Thanks.
~ Oleksii
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